Farady 50kva power transformer used in Transmission network

Farady 50kva power transformer are used in Transmission network so they do not directly connect to the consumers, so load fluctuations are very less. These are loaded fully during 24 hrs a day, so Cu losses & Fe losses takes place throughout day the specific weight i.e. (iron weight)/(cu weight) is very less.The average loads are nearer to fully loaded or full load and these are designed in such a way that maximum efficiency at farady auto load booster condition. These are independent of time so in calculating the efficiency only power basis is enough.